JXTA Instant Messenger (J.I.M) is a project that aims to establish a server free, pure P2P Instant Messaging system. It is based on Java, JXTA (www.jxta.org) and the JavaCryptographyExtensionJCE and provides a nice Swing based GUI.
A secure PKI-based client/server encrypted chat engine under development in Java. Encryption will be supported via JCE and PKCS#11. A simple Java interface can be implemented by other projects wishing to develop a Java GUI or CLI for the client.